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C&P OF VIRGINIA PROVIDES DEDICATED SYNCHRONOUS OPTICAL NETWORK (SONET) TO GOVERNMENT AND DEFENSE ORGANIZATIONS IN CRYSTAL CITY, VA.

 ARLINGTON, Va., Feb. 22 /PRNewswire/ -- Leading government and defense organizations in Crystal City, Va., can now have greater network reliability, more flexible service offerings and potentially lower costs than ever before because a dedicated Synchronous Optical Network (SONET) has been installed by The Chesapeake and Potomac Telephone Company of Virginia, a Bell Atlantic telephone company.
 SONET is an evolving network standard developed by Bellcore (Bell Communications Research), an organization representing the regional bell operating companies for the purpose of establishing telephone- network standards and interfaces. It has been designed to connect high-speed transmission equipment and it offers a host of advantages to customers who select a Bell Atlantic telephone company as their access provider of choice. Most importantly, it allows greater protection for customers who cannot afford even minimal downtime.
 SONET technology offers the equivalent of total network redundancy -- without doubling the price of the network as well. A SONET fiber optic ring allows economical, end-to-end, disaster-secure connections between customer locations, between customer locations and long distance carriers, and between customer locations and telephone company central offices. If one of the five links between customer locations is cut or if there is a central office failure, the traffic reverses direction and travels on the alternate fiber path to reach its ultimate destination. This self-healing process takes just 50 milliseconds.
 SONET technology is particularly effective in applications where it is absolutely essential to keep network downtime to a minimum, such as Asynchronous Transfer Mode (ATM) networking, Local Area Network (LAN) interconnections and mainframe-to-mainframe computer links.
 Customers on the new SONET-based fiber optic ring include the Department of Defense, Lockheed, the Environmental Protection Agency, Rockwell International and McDonnell Douglas.
 The Crystal City ring is a six-node application that includes two central offices and four remote sites. The network is a unidirectional-path switched self-healing ring; that is, traffic flows uniformly in a single direction around the ring -- normally clockwise.
 Should a receiving terminal on the ring detect any interruption or break, the traffic automatically switches to the other direction, thereby maintaining the complete traffic circuit for the customer. The ring's interspersed multiplexers also will switch transmission direction automatically if they sense that doing so will produce a better quality signal.
 The ring will initially provide service speeds up to the OC-3 level -- the equivalent of three DS-3s or 84 DS-1s, for a total of 150 megabits per second.
 With other SONET rings being deployed in Newark, Philadelphia, Pittsburgh and Washington, the Bell Atlantic telephone companies are the leaders in providing next generation technology to meet their customers' needs.
 With SONET self-healing rings in place, customers will be able to order new voice, data and video services and be on-line in just a few hours instead of days. Faster provisioning is critical to businesses that are moving to new offices.
 Soon the Bell Atlantic telephone companies will offer broadband on demand services using the ring's ability to provide digital bandwidth dynamically when and where the customer desires.
 "It will be possible to provision services literally within minutes of an order," said Marty Schultz, manager, C&P facility provisioning, northern Virginia. "A DS-1 circuit can be easily added to or subtracted from the network traffic flow on the SONET ring. For example, on short notice, a company will be able to have a DS-1 sent to its building to hook up new computer equipment."
 In the future, SONET enhancements may provide Bell Atlantic telephone company customers with improved bandwidth provisioning intervals and increased bandwidth management capabilities. Ultimately, the rings may enable customers to monitor network performance themselves.
 Bell Atlantic Corporation (NYSE: BEL), based in Philadelphia, is the parent of New Jersey Bell, Bell of Pennsylvania, Diamond State Telephone (Delaware) and the Chesapeake and Potomac Telephone Companies serving Maryland, Virginia, West Virginia and Washington.
 Bell Atlantic also is the parent of one of the nation's largest cellular carriers and of companies that provide business systems services for customer-based information technology, including software, systems integration, hardware and software service and support and financial services, throughout the United States and internationally. In addition, Bell Atlantic International offers network services and consulting to telephone authorities throughout the world and owns a portion of Telecom Corporation of New Zealand.
 /delval/
 -0- 2/22/93
 /CONTACT: Nancy Murray of Bell Atlantic, 703-974-1719/
 (BEL)


CO: Bell Atlantic; The Chesapeake and Potomac Telephone Company of
 Virginia ST: Virginia IN: TLS SU: PDT


DC -- DC015 -- 0043 02/22/93 13:35 EST
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Date:Feb 22, 1993
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